Objective To discuss the treatment and clinical efficacy of repair of soft tissue and nerve defect of thumb with island flap of first dorsal metacarpal artery based on the first dorsal metacarpal artery carrying dorsal branch graft of digital proper nerve.Methods The skin and nerve defect in 14 thumbs were repaired by dorsal island flap of index fingers based on the first dorsal metacarpal artery carrying dorsal branch graft of digital proper nerve.The size of skin defect ranged from 52 mm × 32 mm to 10 mm × 8 mm.The length of the nerve defect ranged from 9 mm to 22 mm.Results The average followup was 6-35 months.All 14 flaps survived with satisfactory appearance and function.The injured side of thumb pulp sensation recovered S3 + and the injured two-point discrimination ranged from 4 mm to 7 mm.No scar contracture or sensory dysfunction complication were observed in the donor sites.Conclusions The repair of soft tissue and nerve defect of thumb with dorsal island flap of index finger based on the first dorsal metacarpal artery carrying dorsal branch graft of digital proper nerve is recommendable,since it can obtain satisfactory clinical efficacy and be easily and conveniently oerformed.

Objective To investigate the changes of serum osteocalcin and bone micro-structure in ovariectomized mice exposed to low-iron environment.Methods Twenty-four 12-week-old female C57BL/6 mice were divided equally into sham operation (SHAM) group,model(OVX) group,and low iron(OVX+DFO) group.In low-iron group,deferoxamine(DFO) was injected 3 times per week for 5 weeks after operation ; the other groups were injected with the same dose of 0.9％ normal saline for 5 weeks.The serum,left femur,uterus were harvested after five weeks of treatment.The serum osteocalcin and ferritin levels were measured by ELISA kit,the weight of the uterus was recorded by analytical balance.A high resolution micro-CT was used to scan the left femur for cortical bone and cancellous bone analysis.Results (1) The serum osteocalcin and serum ferritin levels in low-iron group were significantly lower than those in the other 2 groups (P＜0.01) ; (2) Compared with the sham group and ovx group,there were significant decrease of the BMD、BV/TV and Tb.N,but increase of Tb.Th and Tb.Sp in low-iron group (P＜0.01).Conclusion A certain dose of DFO (30 mg/kg) can decrease the serum ferritin levels as well as the bone formation index in ovariectomized mice.

Trehalose, a compatible solute, is widely used in food, cosmetics, pharmaceutical products and organ transplantation. Nowadays, trehalose is mostly produced by enzymatic synthesis with many secondary products and lowpurity. In this study, high amount of trehalose was produced by recombinant E. ccli fermentation. First, a bifunctional trehalose gene TPSP was amplified from genome of C. hutchinscoii. Second, an expression vector pTac-HisA containing TPSP was constructed and transformed into the host E. coli. Expression of this bifunctional enzyme-TPSP converted glucose to trehalose. The result suggested that TPSP from C. hutchinsonji has been successfully expressed in E. ccoi. High amount of extracellular trehalose generated from glucose by whole-cell catalysis and After optimization, the production of trehalose in shake flasks was improved to 1.2 g/L and the relative conversion rate reached 21%. The production in bioreactor reached 13.3 g/L and the relative conversion rate reached 48.6%. It is the first time to realize the functional expression of the bifunctional enzyme-TPSP of C. hutchinsonii in E. coli and achieved the conversion form glucose to trehalose. This study laid a foundation for industrial large-scale production of trehalose.
Bioreactors ; Catalysis ; Escherichia coli ; genetics ; Glucose ; Glucosyltransferases ; Industrial Microbiology ; Organisms, Genetically Modified ; Trehalose ; biosynthesis

Objective To ostimate the distribution of microorganism strains isolated from hospital ward cir-curmstanee and clinical specimens, and then proceed to inquire into their interrelation to nosocomial infection, provi-ding evidence for preventing and reducing nosocomial infection. Methods Specimens were collected from hospital circumstance and each clinical laboratory, and then made a bacterial identification and pathogen strains survey. Re-sults There was a closed correlation between the microorganism strain isolated from hospital circumstance and clini-cal infection pathogen(86%). Conclusion A series of disinfection management measures should be made and for-mulated so as to reduce the hospital infection rate as far as possible.

Objective To evaluate the effects of inhaled aerosolized different doses of lidocaine on lung injury in patients undergoing cardiac valve replacement under cardiopulmonary bypass (CPB).Methods Thirty ASA physical status Ⅱ or Ⅲ patients of both sexes,aged 18-58 yr,weighing 35-70 kg,undergoing elective cardiac valve replacement with CPB,were randomly divided into 3 groups (n =10 each) using a random number table:control group (group C),lidocaine 100 mg group (group L1) and lidocaine 200 mg group (group L2).Anesthesia was induced with iv injection of midazolam,etomidate,fentanyl and vecuronium.The patients were endotracheally intubated and mechanically ventilated.The aemsolized normal saline 10 ml,2％ lidocaine 5 ml + saline 5 ml and 2％ lidocaine 10 ml were inhaled in C,L1 and L2 groups,respectively,starting from 10 min after induction.At 10 min after induction (T0),1 and 10 min after opening of vena cava (T1,2),and the end of CPB (T3),blood samples were collected from the left radial artery (LRA) and right atrium (RA) for determination of plasma interleukin8 (IL-8),tumor necrosis factor-α (TNF-α) and malondialdehyde (MDA) concentrations (using ELISA) and the expression of CD11 b on polymorphonuclear leukocytes (by flow cytometry).Blood samples were collected from the left radial artery at T0,immediately after beginning of CPB,at T3 and at 2 and 6 h after termination of CPB for blood gas analysis.The oxygenation index (OI),respiratory index (RI) and dynamic lung compliance (Cdyn) were calculated.Results Compared with group C,the ratio between IL-8 concentration in LRA and in RA (concentration of IL-8LRA/RA) was significantly decreased at T2,3,the concentration of MDALRA/RA was decreased at T3 (P ＜ 0.05),no significant change was found in the expression of CD11bLRA/RA at each time point (P ＞ 0.05),and RI was decreased at T3 in L1 and L2 groups (P ＜ 0.05).There were no significant differences in the concentration of IL-8LRA/RA,TNF-αLRA/RA and MDALRA/RA,expression of CD11bLR A/RA,RI,OI and Cdyn at each time point between group L2 and group L1 (P ＞ 0.05).Conclusion Aerosolized lidocaine inhalation can attenuate lung injury and improve lung function in patients undergoing cardiac valve replacement under CPB by reducing inflammatory responses and lipid peroxidation in lung tissues.

Objective To study the effects of shRNA-CtBP2 on the growth of prostate cancer PC3 cells. Methods There were three experimental groups in this study,which include blank control group, empty plasmid transfected group and transfected shRNA group. CtBP2 mRNA sequence is targeted by 3 pairs of designed interfering shRNA to built shRNA-Ct-BP2 recombinant plasmid then it is transfected into PC3 cells. Reverse transcriptase polymerase chain reaction (RT-PCR) and Western blot assays were used to detect the transcription and expression levels of CtBP2 mRNA and protein, respective-ly. PC3l proliferation was measured by MTT assay. Results Builting shRNA-CtBP2 recombinant plasmid and transfect-ing PC3 cells were successful. Transcription and expression levels of CtBP2 mRNA and protein were significantly decreased in shRNA-CtBP2 transfected PC3 cells. After CtBP2 silencing, cell proliferation was blocked in the shRNA-CtBP2 cells compared to that of blank control group (P<0.01). Conclusion shRNA-CtBP2 could significantly inhibit CtBP2 expres-sion, suppress the growth of PC3 cells, which suggests that CtBP2 may be a new target for PCa gene therapy.

BACKGROUND: Animal experimental studies have confirmed that cell transplantation, neurotrophic factor infusion or transplantation as well as other methods can alter the local environment of injured spinal cord and promote its partial function recovery.OBJECTIVE: This study aimed to assess the clinical efficacy of olfactory ensheathing cell transplantation for the treatment of the sequel of myelitis, and to explore whether it would promote the recovery of the spinal cord function.DESIGN: A non-randomized self-control study.SETTING: Ward of Second Department of Surgery of Taian Disabled Soldiers Hospital of Shandong Province.PARTICIPANTS: Thirty-two patients with obsolete myelitis, who come from all over China and suffered from disease for 0.5 to 7 years, admitted to our hospital between June 2004 and July 2007 were recruited in this study. The involved patients, including 21 males and 11 females, were aged 5-48 years. Their neurological functions were not obviously improved after various conventional treatments and limb function exercise. Meanwhile, various sensorimotors and autonomic nerve functional impairments were left. Among the patients, 18 suffered from acute viral myelitis, 8 from acute purulent myelitis and 6 from tuberculous myelitis. After onset, they were all given large doses of radiosonde,dexamethasone, anti-inflammatory and immunomodulatory drugs and various neurotrophic drugs. Twenty-six patients presented complete injury and six patients incomplete injury. Informed consent of treatment was obtained from each patient. The therapeutic protocol was approved by the Ethics Committee of the hospital. Embryonic olfactory bulbs were harvested from aborted embryo, which was donated voluntarily by the patients or their relatives.METHODS: Cells were isolated from embryonic olfactory bulbs, cultured and purified for 7 to 14 days, and finally they were digested into single-cell suspension. Under the surgical miscroscope, the cells were transplanted onto the regions which were above or below the spinal cord injury site. Two weeks to 2 months postoperatively, neurological function of spinal cord was assessed by using the American Spinal Injury Association (ASIA) Scoring Standard formulated in 2000, and was compared to pre-operation function.MAIN OUTCOME MEASURES: ①Sensory function change. ②Motor function change.RESULTS: Half a year to 2 years after olfactory ensheathing cell transplantation, the sensory and motor functions of 32 patients were all obviously improved (motor function: 55.72±10.50 vs. 51.53±13.41; light touch:69.53±11.68 vs.63.06±15.98; pain sense: 69.50±12.20 vs. 64.03±15.0, all P ＜ 0.01 ).CONCLUSION: Olfactory ensheathing cell transplantation can help to promote the neurological function recovery of patients with the sequel of myelitis. However, its long-term curative effect needs to be further investigated.

BACKGROUND:Animal experimental studies have confirmed that cell transplantation,neurotrophic factor infusion or transplantation as well as other methods can alter the local environment of injured spinal cord and promote its partial function recovery. OBJECTIVE:This study aimed to assess the clinical efficacy of olfactory ensheathing cell transplantation for the treatment of the sequel of myelitis,and to explore whether it would promote the recovery of the spinal cord function. DESIGN:A non-randomized self-control study. SETTING:Ward of Second Department of Surgery of Taian Disabled Soldiers Hospital of Shandong Province. PARTICIPANTS:Thirty-two patients with obsolete myelitis,who come from all over China and suffered from disease for 0.5 to 7 years,admitted to our hospital between June 2004 and July 2007 were recruited in this study.The involved patients,including 21 males and 11 females,were aged 5-48 years.Their neurological functions were not obviously improved after various conventional treatments and limb function exercise.Meanwhile,various sensorimotors and autonomic nerve functional impairments were left.Among the patients,18 suffered from acute viral myelitis,8 from acute purulent myelitis and 6 from tuberculous myelitis.After onset,they were all given large doses of radiosonde, dexamethasone,anti-inflammatory and immunomodulatory drugs and various neurotrophic drugs.Twenty-six patients presented complete injury and six patients incomplete injury.Informed consent of treatment was obtained from each patient.The therapeutic protocol was approved by the Ethics Committee of the hospital.Embryonic olfactory bulbs were harvested from aborted embryo,which was donated voluntarily by the patients or their relatives. METHODS:Cells were isolated from embryonic olfactory bulbs,cultured and purified for 7 to 14 days,and finally they were digested into single-cell suspension.Under the surgical miscroscope,the cells were transplanted onto the regions which were above or below the spinal cord injury site.Two weeks to 2 months postoperatively,neurological function of spinal cord was assessed by using the American Spinal Injury Association(ASIA)Scoring Standard formulated in 2000,and was compared to pre-operation function. MAIN OUTCOME MEASURES:①Sensory function change.②Motor function change. RESULTS:Half a year to 2 years after olfactory ensheathing cell transplantation,the sensory and motor functions of 32 patients were all obviously improved(motor function:55.72?10.50 vs.51.53?13.41;light touch:69.53?11.68 vs. 63.06?15.98;pain sense:69.50?12.20 vs.64.03?15.0,all P

BACKGROUND:Osteopontin mRNA and protein expressions are highly correlated with the severity of osteoarthritis. OBJECTIVE:To investigate the effect of osteopontin on the gene expression of aggrecan and type II colagen in the human knee osteoarthritic chondrocytes in vitro. METHODS: Chondrocytes were harvested from human osteoarthritic knees and culturedin vitro. The chondrocytes were cultured with 0 (blank control group), 0.1, 1 mg/L osteopontin, respectively, for 48 hours. Real-time PCR was employed to detect the mRNA expression of aggrecan and type II colagen. RESULTS AND CONCLUSION:After 0.1 and 1 mg/L osteopontin intervention, the mRNA expression of aggrecan and type II colagen in osteoarthritic chondrocytes was increased significantly (P< 0.05), and the mRNA expression of aggrecan and type II colagen was higher in the 1 mg/L osteopontin group than the 0.1 mg/L osteopontin group (P< 0.05). In addition, the mRNA expression of aggrecan and type II colagen was positively correlated with the concentration of osteopontin (r=0.751,P < 0.01;r=0.676,P < 0.01). These findings indicate that osteopontin up-regulates the mRNA expression of aggrecan and type II colagen in osteoarthritic chondrocytes of human kneein vitro in a dose-dependent manner.